Rotary pump for pumping liquids



G. HANDLEY.

ROTARY PUMP FOR PUMPING LIQUIDS.

APPLICATION FILED DCT. 24, I9l9.

G. HANDLEY.

ROTARY PUMP FOR PUMPiNG LIQUIDS.

APPLICATION mep ocr. 24, |919.

1,353,745. Patenteaspt. 21,1920.

3 SHEETS-SHEET 2.

may

www g #we/@ APPLlcATxoN mso ocr. 24. |919.

Patenasept. 21,1920. 3 SHEETS-SHEET 3.

riff-25A GEORGE HANDLEY, or ram/inns GREEN, ENGLAND, v assreNoa To PERCYLWILLIAM BULLocK, or LONDON, ENGLAND.y

ROTARY PlVIP FOR PUMPING LIQUIDS.

l Application le. October 24, 1919.- Serial No. 333,022.

To all whom t may concern: y

Be it known that I, GEORGE HANDLEY, a subject of the King of Great Britain, residing at Palmers Green, in the county of Middlesex, England, have invented new and useful improvements in Rotary Pumps for Pumping Liquids, of which the following is a specification;

This invention relates to pumps of the type in vwhich a cylindrical rotor is caused to move within a cylindrical chamber of larger diameter, by means of an eccentric mounted on the driving shaft, the rotor having attached to, or formed upon it, a blade or stem, dividing the pump ychamber into two compartments, such stem being provided with a channel leading to thel pump outlet, and sliding in an oscillatory bearing.

The object vof the. present invention is to provide a rotary pump of the type speciiied so constructed as to conserve the momentum of the incoming fluid in order that such momentum may be fully utilized in insuring that the fluid shall follow the rotor and so enable the lmaximum effective :speed of n running to be attained.

This `object is attained in a single pump by lmeans ofV an annular chamber surrounding the pump chamber andan a twin pump in which a pair of pumps are driven 'from a single shaft, by directing the fluidl into each pump alternately'byY means of a special distance piece.

.Inthe calse of a single pump, an annular chamber vis provided to :surround almost completely the pump chamber proper. One end of said annular chamber communicates .with the pump chamber at aV point adjacent to one side `of the oscillatory bearing, and the other end terminates near the other side of the oscillatory bearing, where it forms a blind end. A flanged opening l:atthe .bottom of the annular chamber Jforms the point Ofcommunication with the suction pipe.

In the case of a twin pump the need for an annular chamber to control 'the uctulations of therflow'is not so great, but there is -still considerable advantage in having a large body of liquid quite close to the inlets of the pumps. For this purpose the .twin

pumps are mounted on opposite sides of a distance piece which is hollow and takes the place of the annular chamber.A The l.part of the driving` shaft which passes through the distance piece is supported by a bearing which in turn is surrounded by an fannular chamber having a flanged openingfat its lower part for attachment to thesuction Specification of Letters IPatent. Patntd Slept, Y219192() y pipe. At the upper part of the annular Y chamber a passage leads to theinlet-s ofl the pumps, which in this case open sidewise. The side plates of the distance piece which support the bea-ring and the annular chamber also carry a common outlet chamber into which the pumps discharge yand to `which the common outlet pipe is attached.

This construction of pump moreover lends itself very conveniently to the fitting of a strainer in the liquid ythoroughfare in 'such a manner as to permit of easy-removal for cleaning purposes without disturbing the 'line attachments. .v

My improved arrangementl insuressim-V plicity and ease of construction, mounting andfifitting, with reduction of Overall vldi,- mensions of pump and Vpipe line attach ments; it serves yto obtain a Adire'ct'pipe line in the vertical "plane of' the pump spindle so that the pump canA be mounted. directly, over a well or mine shaft for example; and it also insures` a more uniformr distribution of externaland internal stresses and `thus `renders a lighter, construction possible.

-'lV[oreOver asapplied to a twin pump it insures a continuous and uniform' flow both in the suctionand inthe delivery pipe but particularly inthe formeras this governs the Output of the pump at any vgiven speed,

.in revolutions per minute, and alsok the maX- imum, effective speed of running.

The arrangement further insures higher c maX1mum, effective, speed and consequent output than is possible with a single pump roo able change of direction, to a minimum; and it conserves the velocity given to a fluid on discharge from the pump chamber by a stream line form of confluence to the common outlet.

In the accompanying` drawings which illustrate my invention Figure 1 is a half side elevation and half section of a single pump.

Fig. 2 is a half elevation and half section taken on the line U-, Fig. l.

lFig. 3 is a half horizontal section and half plan of the pump.

Fig. 4 is a half side elevation and half section through one of the cylinders of a twim pump.

Fig. 5 is a half elevation and half section taken on the line y/-y, Fig. 4.

Fig. 6 is a section taken on the line c-, Fig. 5.

Fig. 7 is a transverse section through one cylinder of a twin pump provided with a strainer, and

Fig. 8 is a section taken on the line 8 8 of Fig. 7.

Like letters of reference denote corresponding parts in the several figures.

eferring to Figs. 1 to 8 is the pump body, B the rotor, C the driving eccentric, D the driving shaft, E the stem of the rotor, F the oscillatory bearing through which the stem FJ slides, and G the pump chamber.

Between the pump body and the pump chamber is an annular chamber H almost completely surrounding the pump chamber. This annular chamber communicates at one end with the pump chamber Ythrough an opening J adjacent to the oscillatory member which is channeled at K as shown. The other end of the annular chamber terminates at L in a dead end near the other side of the oscillatory bearing. A flanged opening at M forms the communication with the suction pipe. The outlet from the pump cham- Vber is through a channel 'N in the stem of the rotor leading to a flanged opening O.

The operation of the pump is as follows During the first portion` of the cycle of operations, the suction is increasing and the pump draws upon the-body of liquid nearest to the inlet, namely, that in the annular chamber. The residual air left in the upper part of the blind end of the annular chamber serves as a spring and by expanding allows the liquid on this side to descend, partlyT taking the place. of that `first drawn upon and preventing undue acceleration of the stream in the suction pipe. During the second part of the cycle, suction diminishes to Zero and the stream of liquid f'oni the suction pipe instead of being checked., flows into the blind end of the annular chamber, the residual air at this end contracting after its previous expansion, and allowing the liquid. to take its place. Thus the liquid in the annular chamber has a regular oscillatory motion while; the flow in the suction pipe is steady.

Referring now to Figs. l to 6, the twin pumps l?, i] are mounted on opposite sides of a hollow distance piece Q which takes the place of the annular chamber.

lThe driving` shaft D passes through both pumps and the distance piece; the eccentrics of the two pumps are set at an angle of 1800 with respect to each other so that the suction of one pump coincides with the discharge from the other pump, and thus tends to maire the discharge fairly uniform. The part of the driving shaft D which passes through the distance piece is supported by a bearing li which in turn is surrounded by an annular chamber S having a flanged inlet opening T at its lower part, and at it. upper part a passage U leading to the pum;y inlets V on each side thereof. 0 is a common outlet for both pumps which outlet communicates vwith the discharge side of cach pump through openings W.

The above described constructions of pumps allow a high velocity of fiow to be attained on account'of the flow in the suc tion pipe being substantially uniform.

lin the modification illustrated in Figs. T and S a strainer is insertedin the pump inlets to interceptv dirt and prevent same from entering the pump chambers. T ie vestibule V leading to the pump chambers is of approximately semi cylindrical form. lts open side leads directly to the pump chamber and its end walls are pierced by two circular openings 11, l2. rlhe inner opening 12 faces a corresponding opening 13` in tho distance piece and constitutes the inlet;

the opening 11 is closed by a removable cap 141- in the cover plate.

The strainer 15 consists of a cylinder of wire gauze or perforated metal, open at each end. The ends of the strainer fit the circular openings 1l, 12 so that fluid drawn from the distance piece must first enter the strainer at its inner end and pass through the strainer into the pump chamber.

The removable cap 14@ enables the strainer to be taken out for cleaning purposes without disturbing any other part ofthe pump. lf desired the removable cap le can be fitted with a circular glass window so that the condition of the strainer can be seen from the outside at any time.

What I claim is 1. A pump Vof the pendulum rotary type, comprising a pump body having a pump chamber formed therein, a rotormounted in said chamber, a stem on said rotor, an oscillatory bearing through which the said stem slides, an annular chamber surrounding almost completely the pump chamber and communicating at one side with the pump chamber at a point adjacent to the os- 2. A twin pump comprising two pumps of the pendulum rotary type, a hollow7 distance piece on opposite sides of which the two pumps are mounted, the interior of the hollow distance piece communicating with thc suction inlet, and with theinlets leading to the pump chambers.

3. Atwin pump comprising a hollow distance piece, a suction pipe communicating Y with the interior of the hollow distance piece, a pump of the pendulum rotary type mounted on each side of the distance piece and provided withvpassages `forming communications, between the pump chambers and the interior of the distance piece, and a common outlet pipe formedon the distance piece in line with the suction pipe and communicating with the outlets from the pump chambers.

4. A twin pump comprising a hollow distance piece, a suction pipe communicating with the interior of vsaid distance piece, a pump of 4the pendulum rotary type mounted on each side of the distance piece and provided with passages forming communi cations between the pump chambers and the interior of the distance piece, said pumps being so set that one is discharging while the other is drawing in, and a common outlet pipe `formed on the distance piece and communicating with the outlets from the` pump chambers.

5. A -twin pump comprising two pumps of the .pendulum rotary type, a hollow distance piece on opposite sides of which the two pumps are mounted, the interior of the hollow distance piece communicating with the suction inlet, and with the inlets leading to the pump chambers and a strainer arranged in theV inlet passage leading to each pump chamber.

6. A twin pump comprising two pumps of the pendulum rotary type, a hollow distance piece on opposite sides of which the two pumps are mounted, the interior of 'the hollow distance piece communicating with the suction inlet, and with the inlets leading `to the pump chambers, and a strainerarranged in the inlet passage leading to each pump chamber and withdrawable through openings in th-e pump body.

GEORGE HANDLEY.

Witnesses:

GEORGE HARRISON, HERBERT A., BREs'roN. 

